Core-box-clamping machine.



P. B. HARRISON & A. P. RISSLER.

GORE BOX OLAMPING MACHINE.

APPLICATION FILED APB..24, 1911.

1,022,363. Pat nted Apr. 2, 1912. l

2 SHEETS-SHEET 1.

P. B. HARRISON & A. P. RISSLER.

GORE BOX OLAMPING MACHINE.

' APPLICATION FILED APR.24, 1011.

Patented Apr. 2, 1912.

2 SHEETS-SHEET 2 UNITE STAT S PATENT OFFICE.

PHILIP B. HARRISON AND ALBIN I. RISSLER, OF CHICAGO, ILLINOIS.

CORE-BOX-CLAMPING MACHINE.

Specification of Letters Patent.

Patented Apr. 2, 1912.

Application filed April 24, 1911. Serial No. 623,054.

To all whom it may concern:

Be it known that we, PHILIP B. HannisoN and ALBIN P. Rissenn, citizens of the United States, residing at Chicago, Illinois, have invented a certain new and useful Improvement in Core- Box- Clamping Machines, of which the following is a full, clear, and exact description, such as will onable others skilled in the art to which it ap pertains to make and use the same, reference being bad to the accompanying drawings, forming part of this specification, in which Figure 1 is an elevational view partly in section of our improved device. Fig. 2 is a diagrammatic view of a modified form. Fig. 3 is an end view of the preferred form. Figs. -t and 5 are detail views.

Our invention relates to an improvement in a core box clamping machine.

As far as we are aware it has been customary up to the present time to use an ordinary iron C clamp for clamping core box halves together while ramming up the cores. This consumes time and is very damaging to the boxes, there being no positive means of control on the box with these clamps.

The object of our invention is to provide a simple form of clamping means for core boxes or the like, which may be under the control of air or steam pressure, or may be controlled by foot power.

By our improved device the pressure on the core box remains practically constant, and may be easily controlled.

Referring to the drawings, 1 indicates the molding table having a bed plate 2 set within an opening 3 in the table, so that the top will be flush with the table top. 1 clamping head designated generally 4 is positioned upon the plate 2, and is comprised of the block 5 with ratchet teeth 6 on top, said block being attached to the plate 2. A rib 7 on the bracket forms a guide tor a groove 8 in a sliding bracket 9, which bracket has teeth 10 cooperating with the teeth 6 on the block 5. The bracket 9 has an upright post 11 forming a bearing for a vertical pin 12 upon which is mounted a lug 13 projecting from a head 14, the lug 13 being positioned intermediate projecting portions 15 of the bracket post 11.

Through the post 11 is a bore 16 for a clamping pin 17 extending through the top of the rib 7, and provided with a clamping nut 18. At the top of the bolt 11 is pivoted at 19 a cam head 20 forming part of a handle or lever 21, the cam 20 being positioned to engage the top of the bracket post 11. The head 11 is provided with strengthening ribs 22. The head 14 is capable of oscillation about the pin 12, on the bracket post 11, and the bracket may be adjusted on the block 5 by moving the handle 21 to a substantially vertical position when the clamping bolt 16 will be released, and the bracket 9 moved to disengage the teeth 6 on the block 5 from the teeth 10 on the bracket. The bracket can then be reclamped and positioned in any desired location on the block 5 according to the requirements of the work and especially the size of the core box.

Below the bed plate 2 is attached a cylinder 23 having a head 24. provided with a stalling box with suitable packing 26 therein, said packing being held in place by means of a cap 27 screwed to the outside of the box Vithin the stufling box 25 is slidably mounted a pistonrod 28 having a piston or plunger 29 fast at one end. The end of the rod 28 is threaded at 30 for a nut 31.

Clamped by means 01. the nut 81 on the rod is a piston 29 comprising members 32 and 33, and an intermediate member 341, which may be of leather or other suitable material. said piece being held in engagement with the walls of the cylinder by means of the part 32 of the piston. The end of the cylinder 23 is screw threaded at 35 for an exteriorly threaded adjustable head 36, said head being cast with a recess 37 for the reception of the nut 31. and also with a handle piece 38. Opposite the head 14. is normally positioned a second head of substantially the same description 39. This head is provided with strengthening ribs 10, and projections or supports 411. A pivot pin 12 is positioned within. the head to form a connection to a lever 43. said lever extending through an opening 141: in the bed plate 2, and provided with a pin at its lower extremity 45, adapted to slide within a slot 4.6 in a bracket 47, positioned at one side of the cylinder 23 and attached to the bed plate 2.

The bracket 47 is of any desirable shape to accomplish its purpose, said bracket being provided with elongated slot at 418 for the reception of a sliding pin 49, said pin being fast upon a triangular shaped lever 50, one corner of which is pivoted to the piston 28 at 51, another corner being pivoted to the tioned the levers 43 and 50, as will be clear from Fig. 3. At the lower extremity of the bracket 47 is bolted a valve casing 56. This casing forms a support for two valves 57 and 58. The valve 57 has a valve stem 59 with a valve collar 60 to be positioned on valve seat 61 on the valve casing. This valve seat is intermediate chambers 62 and 63 in the valve casing. Chamber 62 1S 1n commu- 'nication with the outside of the casing through an opening 64 to which may be attached a pipe 65.

The valve collar is held seated on the valve seat 61 by means of a spring 66 within the chamber 63. The valve stem 59 is seated within adjustable bearings 67 and 68 at either end, and if desired, a packing 69 may be placed between the adjustable bearing 68 and the casing so as to prevent leakage. The chamber 63 is in communication with a source of air under pressure through a pipe 70. The valve 58 is provided with a stem 71 having a valve collar 72 with beveled faces thereon adapted to seat against the valve seat 73 in the casing intermediate the chambers 74 and 75. A spring 76 is positioned within the chamber 75 around the stem 71 to normally hold the valve collar 72 upon its seat. Chamber 74 is in communication with a pipe leading to the atmosphere, and chamber 75 has communication with a pipe 77 through an opening 77*.

Pivoted to the valve casing at 78 is a knee lever 79 curved to easily fit against the operators knee. This lever is pivoted between two projecting lugs 80 on the casing and has on opposite sides of the pivot pin 78 projecting flat surfaces 81 and 82. The surface 81 is in position to engage the valve stem 59, and surface 82 to engage the stem 71. hen the lever is in the dotted line position shown in Fig. 4 both valve stems are arranged so that the valve collars 60 and 72 are seated to close communication between the chambers 62 and 63 and chambers 74 and 75.

The pipe is provided with an ordinary valve 83 intermediate its ends, and is connected at one end with a nozzle 84 project ing from the cylinder 23. Pipe 77 is connected to a nozzle 85 communicating with the interior of the cylinder 23 on the side op posite from the nozzle 84. By this arrangement both pipes 65 and 7 7 are in communication with the interior of the cylinder 23.

As shown in Fig. 1, a hood 91 which is movable on the table 1 may be used in order to inclose the clamping head 14, and parts for clamping the same. This hood. has an inclined back 92 and horizontal top 93 and by its use the operator may draw the sand from the table 1 upon the inclined back 92 to the horizontal portion 93 where it can be easily placed within the core box. This hood may be placed in position and removed as desired.

In Fig. 2 is shown a slight modification of the arrangements of parts, and in this view the levers 43 and 50 are exactly the same in every respect as in the form already described and a rod 86 is connected to one corner of the lever 50, Which rod is pivoted to a bell-crank lever 87 connected by a link 88 to a foot lever 89, said lever being provided with a spring 90 to retain it in its upper position.

The operation of our machine will now be described: The core box is placed in position against the head 14 which is adjusted in the manner already described. The head 39 is then positioned to clamp the box against the head 14. This is accomplished by turning the lever 79 to open the valve 60, thereby allowing the air from the source of supply to pass into pipe 65 and thence to the cylinder 23 where it acts upon the pis ton 29 to move it against the adjustable head 35. This movement of the piston operates upon the levers 50 and 43 and holds the head 40 in a definite clamping position against the box. Obviously the amount of pressure can be regulated by positioning the head 35, and the speed of the clamp by opening and closing valve 83. When the core has been rammed within the box the lever 79 is moved in the opposite direction about the pivot 78 to close the valve 60 and open the valve 72 allowing the air to exhaust from the cylinder 23 to the atmosphere. This releases the pressure on the piston and the head 40 can be moved to release the box. It should also be noted that the lever 43 is free to be moved downwardly under pressure by having the pin 45 slidably mounted in the slot 49, and the head 40 is capable of oscillation about the lever due to its pivotal connection thereto so that the core can be positioned substantially level with the table top 1. It is obvious that with a very slight modification of the parts steam or water under pressure could be used to move the piston 29, and as is apparent from Fig. 2 the application of foot power could also be made use of.

We do not wish it to be understood that we limit the use of our improved structure to clamping core boxes in position, and it is obvious that it may be used for many other and dissimilar uses. We also do not desire to be limited to the exact forms of our invention illustrated in the drawings for we are aware that minor changes may be made in the construction, arrangement and combination of the various elements of our device without departing from the spirit of our invention, the scope of which is indicated in the accompanying claims.

\Veclaim:

1. In a device of the character described, a clamping head, a lever forming a support therefor, a piston rod connected to said lever, a piston on said rod, a cylinder within which the piston moves, an adjustable head for the cylinder, and means for introducing a fluid under pressure within said cylinder, to act upon said piston.

2. In a device of the character described, a clamping head, a lever forming a support therefor having fulcrum pins, a bracket, said bracket having elongated openings within which the fulcrum pins of the lever move so that the clamping head may be lowered.

3. In a device of the character described, a clamping head, a lever forming a support therefor having fulcrum pins, to which lever the clamping head is pivoted, a bracket, said bracket having elongated openings within which the fulcrum pins of the lever move so that the clamping head may be lowered.

4. In a device of the character described, a clamping head, a lever support therefor, having fulcrum pins, a bracket havin elongated openings forming guide ways for the fulcrum pins, a second lever pivoted to the first having a fulcrum pin moving within a guide way in the bracket, and means connected to said second lever to exert a pressure upon said clamping head.

5. In a device of the class described, a clamping head, a second clamping head, a cylinder, a piston in said cylinder connected to said clamping head, and adjustable means within said cylinder for limiting the movement of said piston.

6. In a device of the class described, a clamping head, a second clamping head, a cylinder and piston for exerting pressure on said second clamping head, and means in said cylinder for regulating the pressure exerted upon said second clamping head.

7. In a device of the class described, a clamping head, a stationary bracket, a lever pivoted in said bracket, a second clamping head pivoted on said lever, motor means, and a second lever pivoted in said bracket and connecting an actuated member of said motor means with said first mentioned lever.

S. In a device of the class described, a table, a clamping head adjustably mounted on said table, a motor means mounted below said table, a bracket mounted below said table, a lever extending through said table and pivoted below said table in said bracket, a second lever pivoted in said bracket and connecting said first mentioned lever with an actuated member of said motor means, and a second clamping head pivoted on said first mentioned lever above the table.

9. In a device of the class described, a table, a clamping head mounted on said table, a bracket depending from said table, a second clamping head, a lever'supporting said second clamping head pivoted in said bracket and adapted for vertical adjustment with reference to said table.

10. In a device of the class described in combination, a table, a support adjustable horizontally on said table, a clamping head pivoted for horizontal movement in said clamping head, a bracket depending from said table, a lever pivoted in said bracket for vertical movement through said table, and a second clamping head pivoted for vertical movement on said lever.

In testimony whereof we hereunto aiiix our signatures in the presence of two witnesses, this 19th day of April, 1911.

PHILIP B. HARRISON. ALBIN I. RISSLER. lVitnesses Eow. T. IVALKER, M. F. HUN'rooN.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, 1). G. 

